package Example17;
class Animal{
    public void shout(){
        System.out.println("喵喵喵...");
    }
}
class Dog extends Animal {
    public void shout(){
        System.out.println("汪汪汪...");
    }
    public void eat(){
        System.out.println("吃骨头..");
    }
}
public class Example17 {
    public static void main(String[] args) {
        Animal a1=new Dog();
        System.out.println("instanceof判断a1是否来自动物类"+(a1 instanceof Animal));
        System.out.println("instanceof判断a1是否来自狗类"+(a1 instanceof Dog));
        Animal a2=new Animal();
        System.out.println("instanceof判断a2是否来自狗类"+(a2 instanceof Dog));
        System.out.println("instanceof判断a2是否来自狗类"+(a2 instanceof Dog));

    }
}